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Slow network performance with lots of connections
by Mark Rogers 08 Apr '10

08 Apr '10

When my Linux box has a lot of connections (eg when downloading an ISO via BitTorrent), the network connectivity gets very slow for other things. Now this could be because the total bandwidth usage is high, but I'm seeing this even when the total bandwidth on my cable connection is say 50kbps down, 10kbps up. As this is cable, I may be hitting Virgin bandwidth limits (I'm not sure how to tell), and this may sometimes be the case because if I test with another PC on my home network I sometimes find it is also slow. Other times the other PC is fine. In any case, killing the torrent download usually (not always) speeds everything up. So, there seem to me to be several possible issues (any/all of which may be applying at different times), but I don't know how to diagnose it. For example, it may be the total number of connections at the router (a cheap Netgear wireless cable router supplied by Virgin), or maybe even at the virgin cable modem box? I try rebooting any of these and sometimes it works, sometimes it doesn't, but I am very aware that I'm just trying random things and not really getting anywhere! -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) @ 13 Clarke Rd, Milton Keynes, MK1 1LG

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Re: [ALUG] Increasing Tomcat Memory
by Paul Grenyer 07 Apr '10

07 Apr '10

Hi > On Sun, Apr 4, 2010 at 10:47 AM, James Elsey <james.elsey(a)gmail.com> wrote: >> From this forum post[1] you should just be able to modify the catalina >> startup script, >> >> Gotta go out so I don't have time to try it myself, but good luck! >> >> [1] >> http://www.coderanch.com/t/421341/Tomcat/change-JVM-setting-Xms-Xmx#1858331 > > I've managed to increase the memory by adding: > > export CATALINA_OPTS="-XmX2048 -Xms2048" > > to /etc/init.d/tomcat. However, it hasn't fixed my deployment problem: > > > deploy-webapp: > > BUILD FAILED > java.lang.OutOfMemoryError: Java heap space > at java.util.Arrays.copyOf(Arrays.java:2786) > at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94) > at sun.net.www.http.PosterOutputStream.write(PosterOutputStream.java:61) > at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105) > at org.apache.catalina.ant.AbstractCatalinaTask.execute(AbstractCatalinaTask.java:215) > at org.apache.catalina.ant.DeployTask.execute(DeployTask.java:201) > at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) > at org.apache.tools.ant.Task.perform(Task.java:348) > at org.apache.tools.ant.Target.execute(Target.java:357) > at org.apache.tools.ant.Target.performTasks(Target.java:385) > at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337) > at org.apache.tools.ant.Project.executeTarget(Project.java:1306) > at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) > at org.apache.tools.ant.Project.executeTargets(Project.java:1189) > at org.apache.tools.ant.Main.runBuild(Main.java:758) > at org.apache.tools.ant.Main.startAnt(Main.java:217) > at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257) > at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104) > > And now I look at the stack trace a bit closer, I wonder if it's Ant > that's running out of space. It was Ant by the look of things. In the end I added: ANT_OPTS="-Xmx1024m -Xms1024m" export ANT_OPTS to /usr/share/ant/bin/ant and it appears to have fixed the problem. -- Thanks Paul Paul Grenyer e: paul.grenyer(a)gmail.com b: paulgrenyer.blogspot.com

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Re: [ALUG] 2 part question!
by Paul Grenyer 06 Apr '10

06 Apr '10

Hi I can't access the link properly on my Blackberry. As it's Qt is it C++? Paul ------Original Message------ From: Chris Walker Sender: main-bounces(a)lists.alug.org.uk To: main(a)lists.alug.org.uk ReplyTo: cdw_alug(a)the-walker-household.co.uk Subject: [ALUG] 2 part question! Sent: 6 Apr 2010 16:23 I am going to have a go at writing an application for my Nokia N900 phone based on this - http://www.forum.nokia.com/info/sw.nokia.com/id/f28e1110-5ef3-4e24-8ff0-29a… What I would also like to do is have a similar database on my desktop machine - it runs Mandriva 2010 64 bit so that I can update one and 'sync' it with the other one. Can somebody point me in the direction of some suitable SQL Lite code please? I've looked and I'm even more confused than I was when I started. TIA. -- __ __| |_ __ __ .----------------------------------------------. / _/ _` \ V V / | mailto:cdw_alug@the-walker-household.co.uk | \__\__,_|\_/\_/ |______________________________________________| _______________________________________________ main(a)lists.alug.org.uk http://www.alug.org.uk/ http://lists.alug.org.uk/mailman/listinfo/main Unsubscribe? See message headers or the web site above!

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2 part question!
by Chris Walker 06 Apr '10

06 Apr '10

I am going to have a go at writing an application for my Nokia N900 phone based on this - http://www.forum.nokia.com/info/sw.nokia.com/id/f28e1110-5ef3-4e24-8ff0-29a… What I would also like to do is have a similar database on my desktop machine - it runs Mandriva 2010 64 bit so that I can update one and 'sync' it with the other one. Can somebody point me in the direction of some suitable SQL Lite code please? I've looked and I'm even more confused than I was when I started. TIA. -- __ __| |_ __ __ .----------------------------------------------. / _/ _` \ V V / | mailto:cdw_alug@the-walker-household.co.uk | \__\__,_|\_/\_/ |______________________________________________|

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MySQL Arrrgg!
by James Bensley 06 Apr '10

06 Apr '10

Knowers of all (I have cross-posted this question to two different lists hence the BCC to not cause unwanted traffic so reply either on list or directly to me off list, its your choice); I am trying to execute the following MySQL statement and am coming up a croppa' SELECT name FROM `visitor` WHERE dob = DATE_SUB(CURDATE(), INTERVAL 21 YEAR) This is to select everyone from a table who is 21 years old, just as an example. The statement runs and returns with no errors but returns no entries (and there are entries that are 21 years old) Ultimately I am going to do something like this (I am just free-writing this so the syntax is probably wrong but hopefully you will get the idea); SELECT name FROM `visitor` WHERE dob BETWEEN DATE_SUB(CURDATE(), INTERVAL 21 YEAR) AND DATE_SUB(CURDATE(), INTERVAL 30 YEAR) to get everyone who is between X and Y years old. Do people think the problem is in my statement or my database? -- Regards, James. http://www.jamesbensley.co.cc/

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Fwd: [Gllug] Open Source Hardware - event & list.
by Richard Lewis 06 Apr '10

06 Apr '10

Hi ALUG, I know there are a few very keen hardware geeks reading this list. The following may be of interest. I guess meetings will be in London, but the list <http://oshug.org/cgi-bin/mailman/listinfo/oshug> may be quite fun. Of course, there's also the question of whether LUGs should splinter off hardware enthusiasts; after all, hardware is pretty useless without software and software is pretty tedious without hardware. -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Richard Lewis ISMS, Computing Goldsmiths, University of London Tel: +44 (0)20 7078 5134 Skype: richardjlewis JID: ironchicken(a)jabber.earth.li http://www.richard-lewis.me.uk/ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- +----------------------------------------------+ | Support open access to scholarship | | http://freeculture.org/ http://www.doaj.org/ | +----------------------------------------------+

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Re: [ALUG] Increasing Tomcat Memory
by James Elsey 04 Apr '10

04 Apr '10

>From this forum post[1] you should just be able to modify the catalina startup script, Gotta go out so I don't have time to try it myself, but good luck! [1] http://www.coderanch.com/t/421341/Tomcat/change-JVM-setting-Xms-Xmx#1858331 James Elsey On 4 April 2010 10:37, Paul Grenyer <paul.grenyer(a)gmail.com> wrote: > Hi > > On Sun, Apr 4, 2010 at 10:34 AM, James Elsey <james.elsey(a)gmail.com> > wrote: > > Hey Paul, > > > > Have you tried playing with the xmx options? > > > > From command prompt, run java -X > > > > There are some options to set the heap size/maximum heap size > > Yeah, my problem is which script to put those options into. > > -- > Thanks > Paul > > Paul Grenyer > e: paul.grenyer(a)gmail.com > b: paulgrenyer.blogspot.com >

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Increasing Tomcat Memory
by Paul Grenyer 04 Apr '10

04 Apr '10

Hi All I've installed Tomcat 6.0 on my build server running ubuntu 9.10. I followed the instructions here: http://www.howtogeek.com/howto/linux/installing-tomcat-6-on-ubuntu/ And it's been working well. However, I think my application has got too big now (lots of third party JARs) and I keep getting out of heap space on deploy. I've googled but I'm struggling to find a way to increase the memory that works. Can anyone give me some pointers, please? -- Thanks Paul Paul Grenyer e: paul.grenyer(a)gmail.com b: paulgrenyer.blogspot.com

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Can anyone help me with this problem
by Tony Aldous 03 Apr '10

03 Apr '10

Hi I'm ald0; Can anyone help me with my Ubuntu installation, I get this message "fsck from-linux-ng 2.16 /dev/sda7: clean, 129398/616512 files, 852648/2465969 blocks" & then everthing stops. Being new to Ubuntu I don't know what to do to sort it out.

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Personal thingies....
by Montmorency 03 Apr '10

03 Apr '10

Thanks for all the positive responses, both on the list and by email. A fair number of people claim to be unsurprised. Which I guess shows how generally crappy I am about being closeted. Also, as somebody commented, April 1st, was possibly a VERY BAD day on which to post such a thing, but I guess I didn't think. Anyway, thanks again. katsmeat. montmorency(a)ukfsn.org bellphegore(a)nerdshack.com

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